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Farmall & IHC Tractors Discussion Forum
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Still need help, M still wont start!

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Granger

02-07-2006 07:39:14




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From my original post I have done several things to figure out the problem. I have proper gas flow to the carburator. I have proper gas flow when I open the drain plug on the carburator. I think I have eliminated the coil as a problem, since I have a spark (when coil wire is pulled off cap & put close to metal & turn engine over). What else should I try first before I get into the carburator?
As a reminder, the tractor was running fine until the other day when it just all of a sudden quit. I have been trying to start it, but it will not crank over. I did notice that gas starts to leak out of the choke lever on the carb now when I attempt to start. Any other suggestions will be greatly appreciated!

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Brownie 45

02-07-2006 16:36:49




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 07:39:14  
If it is a 12 volt conversion, I'm assuming that you have already checked the resistor in the primary wire to the coil. To eliminate wiring problems ahead of the coil, use a length of 2 conductor wire[ lamp cord is ok] with a voltmeter on one end & 2 aligator clips on the other. Maintaining correct polarity, connect the aligator clips - one to the "hot"[ignition switch] terminal on the coil,& the other to a convenient ground. Take the meter back to the operator's station & see what the voltage reads while cranking, running[ or stalling] & see if you have problems in this area. I fought a brand new condenser on my 73 IH pickup one day for 3 hours. Turned out it was a bad brand new one. Might want to flex all terminations[ terminal ends] where they connect to coil, ign. switch, or even in the distributor. Had a bad wire once where it went through the distributor housing- it was intermittent & very annoying & hard to find.

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captaink

02-07-2006 10:03:54




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 07:39:14  
If you have gas running out of the choke shaft on the carburetor, you have too much gas in the carburetor. This can be caused by the float having gas in it and is sinking, the float is bent and hangs up on the body of the carburetor, or the needle valve is leaking, or something odd like the float broke.

A drip from the bottom of the carburetor is common, running out of the choke shaft isn’t. Spark at the plugs should be nice and blue and jump about ½ an inch to ground.

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old

02-07-2006 08:17:21




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 07:39:14  
Well if you have a good spark from the ciol wire that menas the points are working right. You have gas to the carb so its probably good. But and heres one thing that you and others always over look. You probably have a bad cap or rotor. I have one tractor that will run real good and then just or of the blue die. Every time it does that its the rotor and some times the cap. I'd replace the cap and rotor and see what happens, I'll almost bet one of them has gone south on you

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Granger

02-07-2006 08:42:37




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 Re: Still need help, M still wont start! in reply to old, 02-07-2006 08:17:21  
old --- Do you know the NAPA part numbers for these?



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RustyFarmall

02-07-2006 11:25:33




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 08:42:37  
Does your M have the horizontal IH distributor or the vertical Delco? Parts will not interchange.



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Granger

02-07-2006 12:26:51




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 Re: Still need help, M still wont start! in reply to RustyFarmall, 02-07-2006 11:25:33  
It has the horizontal distributor.



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old

02-07-2006 09:40:34




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 08:42:37  
Sorry no I don't, I do know that a good number of tractors use the same cap and rotor, if I remember right the H, M, 300, 350, 400 and 450 and a few others use the same ones. NAPA should have a book that lists them.



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El Toro

02-07-2006 08:01:54




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 07:39:14  
You may have spark at the coil wire which is good,
but you need to check for fire at the sparkplugs.
Pull one of your plug wires off and have someone
attempt to start engine. Be sure you reconnect
the coil wire back on the cap. If there's no fire at the plugs you probably need a set of points and condenser. If you have fire at the plugs your plugs may be wet from flooding.

You should bring No1 piston up on the compression stroke to TDC. Hold your thumb over No1 plug hole while someone slowly cranks over the engine until you feel pressure against your thumb. Then look for the notch on the damper pulley. Align
that notch with the pointer.

Then remove the distributor cap and look to see where the rotor is pointing. This is very important. The woodruff key may have sheared on your distributor drive. The rotor should be at the No1 plug tower. Hal

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RustyFarmall

02-07-2006 07:56:58




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 Re: Still need help, M still wont start! in reply to Granger, 02-07-2006 07:39:14  
The gas leaking from the carb is kind of a normal thing, they will all do that if the engine doesn't fire soon after you begin cranking it. Also, an engine that just suddenly quits usually doesn't have carb problems, you have already found that you have a good flow of gas to the carb, so I don't think the carb is the problem. I honestly think the problem has got to be with the ignition. A coil in good condition should give a nice fat and blue spark, not a thin yellow colored spark. Also, check that all of the wiring is good and connections tight. Don't know, these things can be very frustrating at times.

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